(19)
(11) EP 2 309 669 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
14.12.2011 Bulletin 2011/50

(43) Date of publication A2:
13.04.2011 Bulletin 2011/15

(21) Application number: 10186514.5

(22) Date of filing: 05.10.2010
(51) International Patent Classification (IPC): 
H04L 1/00(2006.01)
 H04L 1/18(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 08.10.2009 JP 2009234503

(71) Applicant: NTT DoCoMo, Inc.
Tokyo 100-6150 (JP)

(72) Inventors:
  • Sangiamwong, Jaturong
    Tokyo 100-6150 (JP)
  • Asai, Takahiro
    Tokyo 100-6150 (JP)
  • Okumura, Yukihiko
    Tokyo 100-6150 (JP)

(74) Representative: Schwabe - Sandmair - Marx 
Patentanwälte Stuntzstraße 16
81677 München
81677 München (DE)

   


(54) Radio communication system using a hybrid ARQ scheme


(57) The present invention is a radio communication system in which a radio transmitting apparatus transmits a packet to a radio receiving apparatus using a HARQ scheme, including a moving speed acquiring unit configured to acquire a moving speed of a radio communication terminal which is the radio transmitting apparatus or the radio receiving apparatus, a selection unit configured to select a transmission method of an information bit and an error correction bit which are transmitted under the HARQ scheme based on the moving speed acquired by the moving speed acquiring unit, and a transmitting unit configured to perform initial transmission and retransmission of the packet according to the transmission method selected by the selection unit.







Search report